/******************************************************************************
*
* Copyright (C) 2003-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* This is the main implementation file for the BTA audio gateway.
*
******************************************************************************/
#include <string.h>
#include "bta_ag_co.h"
#include "bta_ag_int.h"
#include "bta_api.h"
#include "bta_sys.h"
#include "osi/include/osi.h"
#include "utl.h"
/*****************************************************************************
* Constants and types
****************************************************************************/
#ifndef BTA_AG_DEBUG
#define BTA_AG_DEBUG FALSE
#endif
extern fixed_queue_t* btu_bta_alarm_queue;
#if (BTA_AG_DEBUG == TRUE)
static char* bta_ag_evt_str(uint16_t event, tBTA_AG_RES result);
static char* bta_ag_state_str(uint8_t state);
#endif
/* state machine states */
enum { BTA_AG_INIT_ST, BTA_AG_OPENING_ST, BTA_AG_OPEN_ST, BTA_AG_CLOSING_ST };
/* state machine action enumeration list */
enum {
BTA_AG_REGISTER,
BTA_AG_DEREGISTER,
BTA_AG_START_OPEN,
BTA_AG_RFC_DO_OPEN,
BTA_AG_RFC_DO_CLOSE,
BTA_AG_START_DEREG,
BTA_AG_START_CLOSE,
BTA_AG_RFC_OPEN,
BTA_AG_OPEN_FAIL,
BTA_AG_RFC_ACP_OPEN,
BTA_AG_RFC_CLOSE,
BTA_AG_RFC_FAIL,
BTA_AG_RFC_DATA,
BTA_AG_DISC_INT_RES,
BTA_AG_DISC_FAIL,
BTA_AG_DISC_ACP_RES,
BTA_AG_FREE_DB,
BTA_AG_SCO_CONN_OPEN,
BTA_AG_SCO_CONN_CLOSE,
BTA_AG_SCO_LISTEN,
BTA_AG_SCO_OPEN,
BTA_AG_SCO_CLOSE,
BTA_AG_SCO_SHUTDOWN,
BTA_AG_POST_SCO_OPEN,
BTA_AG_POST_SCO_CLOSE,
BTA_AG_SVC_CONN_OPEN,
BTA_AG_RESULT,
BTA_AG_SETCODEC,
BTA_AG_SEND_RING,
BTA_AG_CI_SCO_DATA,
BTA_AG_CI_RX_DATA,
BTA_AG_RCVD_SLC_READY,
BTA_AG_NUM_ACTIONS
};
#define BTA_AG_IGNORE BTA_AG_NUM_ACTIONS
/* type for action functions */
typedef void (*tBTA_AG_ACTION)(tBTA_AG_SCB* p_scb, tBTA_AG_DATA* p_data);
/* action functions */
const tBTA_AG_ACTION bta_ag_action[] = {
bta_ag_register, bta_ag_deregister, bta_ag_start_open,
bta_ag_rfc_do_open, bta_ag_rfc_do_close, bta_ag_start_dereg,
bta_ag_start_close, bta_ag_rfc_open, bta_ag_open_fail,
bta_ag_rfc_acp_open, bta_ag_rfc_close, bta_ag_rfc_fail,
bta_ag_rfc_data, bta_ag_disc_int_res, bta_ag_disc_fail,
bta_ag_disc_acp_res, bta_ag_free_db, bta_ag_sco_conn_open,
bta_ag_sco_conn_close, bta_ag_sco_listen, bta_ag_sco_open,
bta_ag_sco_close, bta_ag_sco_shutdown, bta_ag_post_sco_open,
bta_ag_post_sco_close, bta_ag_svc_conn_open, bta_ag_result,
bta_ag_setcodec, bta_ag_send_ring, bta_ag_ci_sco_data,
bta_ag_ci_rx_data, bta_ag_rcvd_slc_ready};
/* state table information */
#define BTA_AG_ACTIONS 2 /* number of actions */
#define BTA_AG_NEXT_STATE 2 /* position of next state */
#define BTA_AG_NUM_COLS 3 /* number of columns in state tables */
/* state table for init state */
const uint8_t bta_ag_st_init[][BTA_AG_NUM_COLS] = {
/* Event Action 1 Action 2 Next state */
/* API_REGISTER_EVT */ {BTA_AG_REGISTER, BTA_AG_IGNORE, BTA_AG_INIT_ST},
/* API_DEREGISTER_EVT */ {BTA_AG_DEREGISTER, BTA_AG_IGNORE, BTA_AG_INIT_ST},
/* API_OPEN_EVT */ {BTA_AG_START_OPEN, BTA_AG_IGNORE, BTA_AG_OPENING_ST},
/* API_CLOSE_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_INIT_ST},
/* API_AUDIO_OPEN_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_INIT_ST},
/* API_AUDIO_CLOSE_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_INIT_ST},
/* API_RESULT_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_INIT_ST},
/* API_SETCODEC_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_INIT_ST},
/* RFC_OPEN_EVT */ {BTA_AG_RFC_ACP_OPEN, BTA_AG_SCO_LISTEN, BTA_AG_OPEN_ST},
/* RFC_CLOSE_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_INIT_ST},
/* RFC_SRV_CLOSE_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_INIT_ST},
/* RFC_DATA_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_INIT_ST},
/* SCO_OPEN_EVT */ {BTA_AG_SCO_CONN_OPEN, BTA_AG_IGNORE, BTA_AG_INIT_ST},
/* SCO_CLOSE_EVT */ {BTA_AG_SCO_CONN_CLOSE, BTA_AG_IGNORE, BTA_AG_INIT_ST},
/* DISC_ACP_RES_EVT */ {BTA_AG_FREE_DB, BTA_AG_IGNORE, BTA_AG_INIT_ST},
/* DISC_INT_RES_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_INIT_ST},
/* DISC_OK_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_INIT_ST},
/* DISC_FAIL_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_INIT_ST},
/* CI_RX_WRITE_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_INIT_ST},
/* RING_TOUT_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_INIT_ST},
/* SVC_TOUT_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_INIT_ST},
/* CI_SCO_DATA_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_INIT_ST},
/* CI_SLC_READY_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_INIT_ST}};
/* state table for opening state */
const uint8_t bta_ag_st_opening[][BTA_AG_NUM_COLS] = {
/* Event Action 1 Action 2 Next state */
/* API_REGISTER_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_OPENING_ST},
/* API_DEREGISTER_EVT */ {BTA_AG_RFC_DO_CLOSE, BTA_AG_START_DEREG,
BTA_AG_CLOSING_ST},
/* API_OPEN_EVT */ {BTA_AG_OPEN_FAIL, BTA_AG_IGNORE, BTA_AG_OPENING_ST},
/* API_CLOSE_EVT */ {BTA_AG_RFC_DO_CLOSE, BTA_AG_IGNORE, BTA_AG_CLOSING_ST},
/* API_AUDIO_OPEN_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_OPENING_ST},
/* API_AUDIO_CLOSE_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_OPENING_ST},
/* API_RESULT_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_OPENING_ST},
/* API_SETCODEC_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_OPENING_ST},
/* RFC_OPEN_EVT */ {BTA_AG_RFC_OPEN, BTA_AG_SCO_LISTEN, BTA_AG_OPEN_ST},
/* RFC_CLOSE_EVT */ {BTA_AG_RFC_FAIL, BTA_AG_IGNORE, BTA_AG_INIT_ST},
/* RFC_SRV_CLOSE_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_OPENING_ST},
/* RFC_DATA_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_OPENING_ST},
/* SCO_OPEN_EVT */ {BTA_AG_SCO_CONN_OPEN, BTA_AG_IGNORE, BTA_AG_OPENING_ST},
/* SCO_CLOSE_EVT */ {BTA_AG_SCO_CONN_CLOSE, BTA_AG_IGNORE,
BTA_AG_OPENING_ST},
/* DISC_ACP_RES_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_OPENING_ST},
/* DISC_INT_RES_EVT */ {BTA_AG_DISC_INT_RES, BTA_AG_IGNORE,
BTA_AG_OPENING_ST},
/* DISC_OK_EVT */ {BTA_AG_RFC_DO_OPEN, BTA_AG_IGNORE, BTA_AG_OPENING_ST},
/* DISC_FAIL_EVT */ {BTA_AG_DISC_FAIL, BTA_AG_IGNORE, BTA_AG_INIT_ST},
/* CI_RX_WRITE_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_OPENING_ST},
/* RING_TOUT_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_OPENING_ST},
/* SVC_TOUT_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_OPENING_ST},
/* CI_SCO_DATA_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_OPENING_ST},
/* CI_SLC_READY_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_OPENING_ST}};
/* state table for open state */
const uint8_t bta_ag_st_open[][BTA_AG_NUM_COLS] = {
/* Event Action 1 Action 2 Next state */
/* API_REGISTER_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_OPEN_ST},
/* API_DEREGISTER_EVT */ {BTA_AG_START_CLOSE, BTA_AG_START_DEREG,
BTA_AG_CLOSING_ST},
/* API_OPEN_EVT */ {BTA_AG_OPEN_FAIL, BTA_AG_IGNORE, BTA_AG_OPEN_ST},
/* API_CLOSE_EVT */ {BTA_AG_START_CLOSE, BTA_AG_IGNORE, BTA_AG_CLOSING_ST},
/* API_AUDIO_OPEN_EVT */ {BTA_AG_SCO_OPEN, BTA_AG_IGNORE, BTA_AG_OPEN_ST},
/* API_AUDIO_CLOSE_EVT */ {BTA_AG_SCO_CLOSE, BTA_AG_IGNORE, BTA_AG_OPEN_ST},
/* API_RESULT_EVT */ {BTA_AG_RESULT, BTA_AG_IGNORE, BTA_AG_OPEN_ST},
/* API_SETCODEC_EVT */ {BTA_AG_SETCODEC, BTA_AG_IGNORE, BTA_AG_OPEN_ST},
/* RFC_OPEN_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_OPEN_ST},
/* RFC_CLOSE_EVT */ {BTA_AG_RFC_CLOSE, BTA_AG_IGNORE, BTA_AG_INIT_ST},
/* RFC_SRV_CLOSE_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_OPEN_ST},
/* RFC_DATA_EVT */ {BTA_AG_RFC_DATA, BTA_AG_IGNORE, BTA_AG_OPEN_ST},
/* SCO_OPEN_EVT */ {BTA_AG_SCO_CONN_OPEN, BTA_AG_POST_SCO_OPEN,
BTA_AG_OPEN_ST},
/* SCO_CLOSE_EVT */ {BTA_AG_SCO_CONN_CLOSE, BTA_AG_POST_SCO_CLOSE,
BTA_AG_OPEN_ST},
/* DISC_ACP_RES_EVT */ {BTA_AG_DISC_ACP_RES, BTA_AG_IGNORE, BTA_AG_OPEN_ST},
/* DISC_INT_RES_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_OPEN_ST},
/* DISC_OK_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_OPEN_ST},
/* DISC_FAIL_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_OPEN_ST},
/* CI_RX_WRITE_EVT */ {BTA_AG_CI_RX_DATA, BTA_AG_IGNORE, BTA_AG_OPEN_ST},
/* RING_TOUT_EVT */ {BTA_AG_SEND_RING, BTA_AG_IGNORE, BTA_AG_OPEN_ST},
/* SVC_TOUT_EVT */ {BTA_AG_START_CLOSE, BTA_AG_IGNORE, BTA_AG_CLOSING_ST},
/* CI_SCO_DATA_EVT */ {BTA_AG_CI_SCO_DATA, BTA_AG_IGNORE, BTA_AG_OPEN_ST},
/* CI_SLC_READY_EVT */
{BTA_AG_RCVD_SLC_READY, BTA_AG_IGNORE, BTA_AG_OPEN_ST}};
/* state table for closing state */
const uint8_t bta_ag_st_closing[][BTA_AG_NUM_COLS] = {
/* Event Action 1 Action 2 Next state */
/* API_REGISTER_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_CLOSING_ST},
/* API_DEREGISTER_EVT */ {BTA_AG_START_DEREG, BTA_AG_IGNORE,
BTA_AG_CLOSING_ST},
/* API_OPEN_EVT */ {BTA_AG_OPEN_FAIL, BTA_AG_IGNORE, BTA_AG_CLOSING_ST},
/* API_CLOSE_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_CLOSING_ST},
/* API_AUDIO_OPEN_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_CLOSING_ST},
/* API_AUDIO_CLOSE_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_CLOSING_ST},
/* API_RESULT_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_CLOSING_ST},
/* API_SETCODEC_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_CLOSING_ST},
/* RFC_OPEN_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_CLOSING_ST},
/* RFC_CLOSE_EVT */ {BTA_AG_RFC_CLOSE, BTA_AG_IGNORE, BTA_AG_INIT_ST},
/* RFC_SRV_CLOSE_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_CLOSING_ST},
/* RFC_DATA_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_CLOSING_ST},
/* SCO_OPEN_EVT */ {BTA_AG_SCO_CONN_OPEN, BTA_AG_IGNORE, BTA_AG_CLOSING_ST},
/* SCO_CLOSE_EVT */ {BTA_AG_SCO_CONN_CLOSE, BTA_AG_POST_SCO_CLOSE,
BTA_AG_CLOSING_ST},
/* DISC_ACP_RES_EVT */ {BTA_AG_FREE_DB, BTA_AG_IGNORE, BTA_AG_CLOSING_ST},
/* DISC_INT_RES_EVT */ {BTA_AG_FREE_DB, BTA_AG_IGNORE, BTA_AG_INIT_ST},
/* DISC_OK_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_CLOSING_ST},
/* DISC_FAIL_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_CLOSING_ST},
/* CI_RX_WRITE_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_CLOSING_ST},
/* RING_TOUT_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_CLOSING_ST},
/* SVC_TOUT_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_CLOSING_ST},
/* CI_SCO_DATA_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_CLOSING_ST},
/* CI_SLC_READY_EVT */ {BTA_AG_IGNORE, BTA_AG_IGNORE, BTA_AG_CLOSING_ST}};
/* type for state table */
typedef const uint8_t (*tBTA_AG_ST_TBL)[BTA_AG_NUM_COLS];
/* state table */
const tBTA_AG_ST_TBL bta_ag_st_tbl[] = {bta_ag_st_init, bta_ag_st_opening,
bta_ag_st_open, bta_ag_st_closing};
/*****************************************************************************
* Global data
****************************************************************************/
/* AG control block */
tBTA_AG_CB bta_ag_cb;
/*******************************************************************************
*
* Function bta_ag_scb_alloc
*
* Description Allocate an AG service control block.
*
*
* Returns pointer to the scb, or NULL if none could be allocated.
*
******************************************************************************/
static tBTA_AG_SCB* bta_ag_scb_alloc(void) {
tBTA_AG_SCB* p_scb = &bta_ag_cb.scb[0];
int i;
for (i = 0; i < BTA_AG_NUM_SCB; i++, p_scb++) {
if (!p_scb->in_use) {
/* initialize variables */
p_scb->in_use = true;
p_scb->sco_idx = BTM_INVALID_SCO_INDEX;
p_scb->codec_updated = false;
p_scb->codec_fallback = false;
p_scb->peer_codecs = BTA_AG_CODEC_CVSD;
p_scb->sco_codec = BTA_AG_CODEC_CVSD;
/* set up timers */
p_scb->ring_timer = alarm_new("bta_ag.scb_ring_timer");
p_scb->collision_timer = alarm_new("bta_ag.scb_collision_timer");
p_scb->codec_negotiation_timer =
alarm_new("bta_ag.scb_codec_negotiation_timer");
/* set eSCO mSBC setting to T2 as the preferred */
p_scb->codec_msbc_settings = BTA_AG_SCO_MSBC_SETTINGS_T2;
APPL_TRACE_DEBUG("bta_ag_scb_alloc %d", bta_ag_scb_to_idx(p_scb));
break;
}
}
if (i == BTA_AG_NUM_SCB) {
/* out of scbs */
p_scb = NULL;
APPL_TRACE_WARNING("%s: Out of scbs", __func__);
}
return p_scb;
}
/*******************************************************************************
*
* Function bta_ag_scb_dealloc
*
* Description Deallocate a service control block.
*
*
* Returns void
*
******************************************************************************/
void bta_ag_scb_dealloc(tBTA_AG_SCB* p_scb) {
uint8_t idx;
bool allocated = false;
APPL_TRACE_DEBUG("bta_ag_scb_dealloc %d", bta_ag_scb_to_idx(p_scb));
/* stop and free timers */
alarm_free(p_scb->ring_timer);
alarm_free(p_scb->codec_negotiation_timer);
alarm_free(p_scb->collision_timer);
/* initialize control block */
memset(p_scb, 0, sizeof(tBTA_AG_SCB));
p_scb->sco_idx = BTM_INVALID_SCO_INDEX;
/* If all scbs are deallocated, callback with disable event */
if (!bta_sys_is_register(BTA_ID_AG)) {
for (idx = 0; idx < BTA_AG_NUM_SCB; idx++) {
if (bta_ag_cb.scb[idx].in_use) {
allocated = true;
break;
}
}
if (!allocated) {
(*bta_ag_cb.p_cback)(BTA_AG_DISABLE_EVT, NULL);
}
}
}
/*******************************************************************************
*
* Function bta_ag_scb_to_idx
*
* Description Given a pointer to an scb, return its index.
*
*
* Returns Index of scb.
*
******************************************************************************/
uint16_t bta_ag_scb_to_idx(tBTA_AG_SCB* p_scb) {
/* use array arithmetic to determine index */
return ((uint16_t)(p_scb - bta_ag_cb.scb)) + 1;
}
/*******************************************************************************
*
* Function bta_ag_scb_by_idx
*
* Description Given an scb index return pointer to scb.
*
*
* Returns Pointer to scb or NULL if not allocated.
*
******************************************************************************/
tBTA_AG_SCB* bta_ag_scb_by_idx(uint16_t idx) {
tBTA_AG_SCB* p_scb;
/* verify index */
if (idx > 0 && idx <= BTA_AG_NUM_SCB) {
p_scb = &bta_ag_cb.scb[idx - 1];
if (!p_scb->in_use) {
p_scb = NULL;
APPL_TRACE_WARNING("ag scb idx %d not allocated", idx);
}
} else {
p_scb = NULL;
APPL_TRACE_DEBUG("ag scb idx %d out of range", idx);
}
return p_scb;
}
/*******************************************************************************
*
* Function bta_ag_service_to_idx
*
* Description Given a BTA service mask convert to profile index.
*
*
* Returns Profile ndex of scb.
*
******************************************************************************/
uint8_t bta_ag_service_to_idx(tBTA_SERVICE_MASK services) {
if (services & BTA_HFP_SERVICE_MASK) {
return BTA_AG_HFP;
} else {
return BTA_AG_HSP;
}
}
/*******************************************************************************
*
* Function bta_ag_idx_by_bdaddr
*
* Description Find SCB associated with peer BD address.
*
*
* Returns Index of SCB or zero if none found.
*
******************************************************************************/
uint16_t bta_ag_idx_by_bdaddr(BD_ADDR peer_addr) {
tBTA_AG_SCB* p_scb = &bta_ag_cb.scb[0];
uint16_t i;
if (peer_addr != NULL) {
for (i = 0; i < BTA_AG_NUM_SCB; i++, p_scb++) {
if (p_scb->in_use && !bdcmp(peer_addr, p_scb->peer_addr)) {
return (i + 1);
}
}
}
/* no scb found */
APPL_TRACE_WARNING("No ag scb for peer addr");
return 0;
}
/*******************************************************************************
*
* Function bta_ag_other_scb_open
*
* Description Check whether any other scb is in open state.
*
*
* Returns true if another scb is in open state, false otherwise.
*
******************************************************************************/
bool bta_ag_other_scb_open(tBTA_AG_SCB* p_curr_scb) {
tBTA_AG_SCB* p_scb = &bta_ag_cb.scb[0];
int i;
for (i = 0; i < BTA_AG_NUM_SCB; i++, p_scb++) {
if (p_scb->in_use && p_scb != p_curr_scb &&
p_scb->state == BTA_AG_OPEN_ST) {
return true;
}
}
/* no other scb found */
APPL_TRACE_DEBUG("No other ag scb open");
return false;
}
/*******************************************************************************
*
* Function bta_ag_scb_open
*
* Description Check whether given scb is in open state.
*
*
* Returns true if scb is in open state, false otherwise.
*
******************************************************************************/
bool bta_ag_scb_open(tBTA_AG_SCB* p_curr_scb) {
if (p_curr_scb && p_curr_scb->in_use && p_curr_scb->state == BTA_AG_OPEN_ST) {
return true;
}
return false;
}
/*******************************************************************************
*
* Function bta_ag_get_other_idle_scb
*
* Description Return other scb if it is in INIT st.
*
*
* Returns Pointer to other scb if INIT st, NULL otherwise.
*
******************************************************************************/
tBTA_AG_SCB* bta_ag_get_other_idle_scb(tBTA_AG_SCB* p_curr_scb) {
tBTA_AG_SCB* p_scb = &bta_ag_cb.scb[0];
uint8_t xx;
for (xx = 0; xx < BTA_AG_NUM_SCB; xx++, p_scb++) {
if (p_scb->in_use && (p_scb != p_curr_scb) &&
(p_scb->state == BTA_AG_INIT_ST)) {
return p_scb;
}
}
/* no other scb found */
APPL_TRACE_DEBUG("bta_ag_get_other_idle_scb: No idle AG scb");
return NULL;
}
/*******************************************************************************
*
* Function bta_ag_collision_timer_cback
*
* Description AG connection collision timer callback
*
*
* Returns void
*
******************************************************************************/
static void bta_ag_collision_timer_cback(void* data) {
tBTA_AG_SCB* p_scb = (tBTA_AG_SCB*)data;
APPL_TRACE_DEBUG("%s", __func__);
/* If the peer haven't opened AG connection */
/* we will restart opening process. */
bta_ag_resume_open(p_scb);
}
/*******************************************************************************
*
* Function bta_ag_collision_cback
*
* Description Get notified about collision.
*
*
* Returns void
*
******************************************************************************/
void bta_ag_collision_cback(UNUSED_ATTR tBTA_SYS_CONN_STATUS status, uint8_t id,
UNUSED_ATTR uint8_t app_id, BD_ADDR peer_addr) {
uint16_t handle;
tBTA_AG_SCB* p_scb;
/* Check if we have opening scb for the peer device. */
handle = bta_ag_idx_by_bdaddr(peer_addr);
p_scb = bta_ag_scb_by_idx(handle);
if (p_scb && (p_scb->state == BTA_AG_OPENING_ST)) {
if (id == BTA_ID_SYS) /* ACL collision */
{
APPL_TRACE_WARNING("AG found collision (ACL) ...");
} else if (id == BTA_ID_AG) /* RFCOMM collision */
{
APPL_TRACE_WARNING("AG found collision (RFCOMM) ...");
} else {
APPL_TRACE_WARNING("AG found collision (\?\?\?) ...");
}
p_scb->state = BTA_AG_INIT_ST;
/* Cancel SDP if it had been started. */
if (p_scb->p_disc_db) {
(void)SDP_CancelServiceSearch(p_scb->p_disc_db);
bta_ag_free_db(p_scb, NULL);
}
/* reopen registered servers */
/* Collision may be detected before or after we close servers. */
if (bta_ag_is_server_closed(p_scb))
bta_ag_start_servers(p_scb, p_scb->reg_services);
/* Start timer to han */
alarm_set_on_queue(p_scb->collision_timer, BTA_AG_COLLISION_TIMEOUT_MS,
bta_ag_collision_timer_cback, p_scb,
btu_bta_alarm_queue);
}
}
/*******************************************************************************
*
* Function bta_ag_resume_open
*
* Description Resume opening process.
*
*
* Returns void
*
******************************************************************************/
void bta_ag_resume_open(tBTA_AG_SCB* p_scb) {
if (p_scb) {
APPL_TRACE_DEBUG("bta_ag_resume_open, Handle(%d)",
bta_ag_scb_to_idx(p_scb));
/* resume opening process. */
if (p_scb->state == BTA_AG_INIT_ST) {
p_scb->state = BTA_AG_OPENING_ST;
bta_ag_start_open(p_scb, NULL);
}
} else {
APPL_TRACE_ERROR("bta_ag_resume_open, Null p_scb");
}
}
/*******************************************************************************
*
* Function bta_ag_api_enable
*
* Description Handle an API enable event.
*
*
* Returns void
*
******************************************************************************/
static void bta_ag_api_enable(tBTA_AG_DATA* p_data) {
/* initialize control block */
for (size_t i = 0; i < BTA_AG_NUM_SCB; i++) {
alarm_free(bta_ag_cb.scb[i].ring_timer);
alarm_free(bta_ag_cb.scb[i].codec_negotiation_timer);
alarm_free(bta_ag_cb.scb[i].collision_timer);
}
memset(&bta_ag_cb, 0, sizeof(tBTA_AG_CB));
/* store callback function */
bta_ag_cb.p_cback = p_data->api_enable.p_cback;
bta_ag_cb.parse_mode = p_data->api_enable.parse_mode;
/* call init call-out */
bta_ag_co_init();
bta_sys_collision_register(BTA_ID_AG, bta_ag_collision_cback);
/* call callback with enable event */
(*bta_ag_cb.p_cback)(BTA_AG_ENABLE_EVT, NULL);
}
/*******************************************************************************
*
* Function bta_ag_api_disable
*
* Description Handle an API disable event.
*
*
* Returns void
*
******************************************************************************/
static void bta_ag_api_disable(tBTA_AG_DATA* p_data) {
/* deregister all scbs in use */
tBTA_AG_SCB* p_scb = &bta_ag_cb.scb[0];
bool do_dereg = false;
int i;
if (!bta_sys_is_register(BTA_ID_AG)) {
APPL_TRACE_ERROR("BTA AG is already disabled, ignoring ...");
return;
}
/* De-register with BTA system manager */
bta_sys_deregister(BTA_ID_AG);
for (i = 0; i < BTA_AG_NUM_SCB; i++, p_scb++) {
if (p_scb->in_use) {
bta_ag_sm_execute(p_scb, BTA_AG_API_DEREGISTER_EVT, p_data);
do_dereg = true;
}
}
if (!do_dereg) {
/* Done, send callback evt to app */
(*bta_ag_cb.p_cback)(BTA_AG_DISABLE_EVT, NULL);
}
bta_sys_collision_register(BTA_ID_AG, NULL);
}
/*******************************************************************************
*
* Function bta_ag_api_register
*
* Description Handle an API event registers a new service.
*
*
* Returns void
*
******************************************************************************/
static void bta_ag_api_register(tBTA_AG_DATA* p_data) {
tBTA_AG_SCB* p_scb;
tBTA_AG_REGISTER reg;
/* allocate an scb */
p_scb = bta_ag_scb_alloc();
if (p_scb != NULL) {
APPL_TRACE_DEBUG("bta_ag_api_register: p_scb 0x%08x ", p_scb);
bta_ag_sm_execute(p_scb, p_data->hdr.event, p_data);
} else {
reg.status = BTA_AG_FAIL_RESOURCES;
(*bta_ag_cb.p_cback)(BTA_AG_REGISTER_EVT, (tBTA_AG*)®);
}
}
/*******************************************************************************
*
* Function bta_ag_api_result
*
* Description Handle an API result event.
*
*
* Returns void
*
******************************************************************************/
static void bta_ag_api_result(tBTA_AG_DATA* p_data) {
tBTA_AG_SCB* p_scb;
int i;
if (p_data->hdr.layer_specific != BTA_AG_HANDLE_ALL) {
p_scb = bta_ag_scb_by_idx(p_data->hdr.layer_specific);
if (p_scb != NULL) {
APPL_TRACE_DEBUG("bta_ag_api_result: p_scb 0x%08x ", p_scb);
bta_ag_sm_execute(p_scb, BTA_AG_API_RESULT_EVT, p_data);
}
} else {
for (i = 0, p_scb = &bta_ag_cb.scb[0]; i < BTA_AG_NUM_SCB; i++, p_scb++) {
if (p_scb->in_use && p_scb->svc_conn) {
APPL_TRACE_DEBUG("bta_ag_api_result p_scb 0x%08x ", p_scb);
bta_ag_sm_execute(p_scb, BTA_AG_API_RESULT_EVT, p_data);
}
}
}
}
/*******************************************************************************
*
* Function bta_ag_sm_execute
*
* Description State machine event handling function for AG
*
*
* Returns void
*
******************************************************************************/
void bta_ag_sm_execute(tBTA_AG_SCB* p_scb, uint16_t event,
tBTA_AG_DATA* p_data) {
tBTA_AG_ST_TBL state_table;
uint8_t action;
int i;
#if (BTA_AG_DEBUG == TRUE)
uint16_t previous_event = event;
uint8_t previous_state = p_scb->state;
/* Ignore displaying of AT results when not connected (Ignored in state
* machine) */
if ((previous_event != BTA_AG_API_RESULT_EVT ||
p_scb->state == BTA_AG_OPEN_ST) &&
event != BTA_AG_CI_SCO_DATA_EVT) {
APPL_TRACE_EVENT("%s: Handle 0x%04x, State %d (%s), Event 0x%04x (%s)",
__func__, bta_ag_scb_to_idx(p_scb), p_scb->state,
bta_ag_state_str(p_scb->state), event,
bta_ag_evt_str(event, p_data->api_result.result));
}
#else
if (event != BTA_AG_CI_SCO_DATA_EVT) {
APPL_TRACE_EVENT("%s: Handle 0x%04x, State %d, Event 0x%04x", __func__,
bta_ag_scb_to_idx(p_scb), p_scb->state, event);
}
#endif
event &= 0x00FF;
if (event >= (BTA_AG_MAX_EVT & 0x00FF)) {
APPL_TRACE_ERROR("%s: event out of range, ignored", __func__);
return;
}
/* look up the state table for the current state */
state_table = bta_ag_st_tbl[p_scb->state];
/* set next state */
p_scb->state = state_table[event][BTA_AG_NEXT_STATE];
/* execute action functions */
for (i = 0; i < BTA_AG_ACTIONS; i++) {
action = state_table[event][i];
if (action != BTA_AG_IGNORE) {
(*bta_ag_action[action])(p_scb, p_data);
} else {
break;
}
}
#if (BTA_AG_DEBUG == TRUE)
if (p_scb->state != previous_state) {
APPL_TRACE_EVENT("%s: State Change: [%s] -> [%s] after Event [%s]",
__func__, bta_ag_state_str(previous_state),
bta_ag_state_str(p_scb->state),
bta_ag_evt_str(previous_event, p_data->api_result.result));
}
#endif
}
/*******************************************************************************
*
* Function bta_ag_hdl_event
*
* Description Data gateway main event handling function.
*
*
* Returns bool
*
******************************************************************************/
bool bta_ag_hdl_event(BT_HDR* p_msg) {
tBTA_AG_SCB* p_scb;
APPL_TRACE_DEBUG("bta_ag_hdl_event: Event 0x%04x ", p_msg->event);
switch (p_msg->event) {
case BTA_AG_API_ENABLE_EVT:
bta_ag_api_enable((tBTA_AG_DATA*)p_msg);
break;
case BTA_AG_API_DISABLE_EVT:
bta_ag_api_disable((tBTA_AG_DATA*)p_msg);
break;
case BTA_AG_API_REGISTER_EVT:
bta_ag_api_register((tBTA_AG_DATA*)p_msg);
break;
case BTA_AG_API_RESULT_EVT:
bta_ag_api_result((tBTA_AG_DATA*)p_msg);
break;
/* all others reference scb by handle */
default:
p_scb = bta_ag_scb_by_idx(p_msg->layer_specific);
if (p_scb != NULL) {
APPL_TRACE_DEBUG("bta_ag_hdl_event: p_scb 0x%08x ", p_scb);
bta_ag_sm_execute(p_scb, p_msg->event, (tBTA_AG_DATA*)p_msg);
}
break;
}
return true;
}
#if (BTA_AG_DEBUG == TRUE)
static char* bta_ag_evt_str(uint16_t event, tBTA_AG_RES result) {
switch (event) {
case BTA_AG_API_REGISTER_EVT:
return "Register Request";
case BTA_AG_API_DEREGISTER_EVT:
return "Deregister Request";
case BTA_AG_API_OPEN_EVT:
return "Open SLC Request";
case BTA_AG_API_CLOSE_EVT:
return "Close SLC Request";
case BTA_AG_API_AUDIO_OPEN_EVT:
return "Open Audio Request";
case BTA_AG_API_AUDIO_CLOSE_EVT:
return "Close Audio Request";
case BTA_AG_API_RESULT_EVT:
switch (result) {
case BTA_AG_SPK_RES:
return ("AT Result BTA_AG_SPK_RES");
case BTA_AG_MIC_RES:
return ("AT Result BTA_AG_MIC_RES");
case BTA_AG_INBAND_RING_RES:
return ("AT Result BTA_AG_INBAND_RING_RES");
case BTA_AG_CIND_RES:
return ("AT Result BTA_AG_CIND_RES");
case BTA_AG_BINP_RES:
return ("AT Result BTA_AG_BINP_RES");
case BTA_AG_IND_RES:
return ("AT Result BTA_AG_IND_RES");
case BTA_AG_BVRA_RES:
return ("AT Result BTA_AG_BVRA_RES");
case BTA_AG_CNUM_RES:
return ("AT Result BTA_AG_CNUM_RES");
case BTA_AG_BTRH_RES:
return ("AT Result BTA_AG_BTRH_RES");
case BTA_AG_CLCC_RES:
return ("AT Result BTA_AG_CLCC_RES");
case BTA_AG_COPS_RES:
return ("AT Result BTA_AG_COPS_RES");
case BTA_AG_IN_CALL_RES:
return ("AT Result BTA_AG_IN_CALL_RES");
case BTA_AG_IN_CALL_CONN_RES:
return ("AT Result BTA_AG_IN_CALL_CONN_RES");
case BTA_AG_CALL_WAIT_RES:
return ("AT Result BTA_AG_CALL_WAIT_RES");
case BTA_AG_OUT_CALL_ORIG_RES:
return ("AT Result BTA_AG_OUT_CALL_ORIG_RES");
case BTA_AG_OUT_CALL_ALERT_RES:
return ("AT Result BTA_AG_OUT_CALL_ALERT_RES");
case BTA_AG_OUT_CALL_CONN_RES:
return ("AT Result BTA_AG_OUT_CALL_CONN_RES");
case BTA_AG_CALL_CANCEL_RES:
return ("AT Result BTA_AG_CALL_CANCEL_RES");
case BTA_AG_END_CALL_RES:
return ("AT Result BTA_AG_END_CALL_RES");
case BTA_AG_UNAT_RES:
return ("AT Result BTA_AG_UNAT_RES");
default:
return ("Unknown AG Result");
}
case BTA_AG_API_SETCODEC_EVT:
return "Set Codec Request";
case BTA_AG_RFC_OPEN_EVT:
return "RFC Opened";
case BTA_AG_RFC_CLOSE_EVT:
return "RFC Closed";
case BTA_AG_RFC_SRV_CLOSE_EVT:
return "RFC SRV Closed";
case BTA_AG_RFC_DATA_EVT:
return "RFC Data";
case BTA_AG_SCO_OPEN_EVT:
return "Audio Opened";
case BTA_AG_SCO_CLOSE_EVT:
return "Audio Closed";
case BTA_AG_DISC_ACP_RES_EVT:
return "Discovery ACP Result";
case BTA_AG_DISC_INT_RES_EVT:
return "Discovery INT Result";
case BTA_AG_DISC_OK_EVT:
return "Discovery OK";
case BTA_AG_DISC_FAIL_EVT:
return "Discovery Failed";
case BTA_AG_CI_RX_WRITE_EVT:
return "CI RX Write";
case BTA_AG_RING_TIMEOUT_EVT:
return "Ring Timeout";
case BTA_AG_SVC_TIMEOUT_EVT:
return "Service Timeout";
case BTA_AG_API_ENABLE_EVT:
return "Enable AG";
case BTA_AG_API_DISABLE_EVT:
return "Disable AG";
case BTA_AG_CI_SCO_DATA_EVT:
return "SCO data Callin";
case BTA_AG_CI_SLC_READY_EVT:
return "SLC Ready Callin";
default:
return "Unknown AG Event";
}
}
static char* bta_ag_state_str(uint8_t state) {
switch (state) {
case BTA_AG_INIT_ST:
return "Initial";
case BTA_AG_OPENING_ST:
return "Opening";
case BTA_AG_OPEN_ST:
return "Open";
case BTA_AG_CLOSING_ST:
return "Closing";
default:
return "Unknown AG State";
}
}
#endif